Trump's Military Options As Iran War Feared: Four Scenarios

There's been no slowdown to the U.S. military buildup around Iran despite both sides engaging in nuclear talks this week.

President Donald Trump has threatened the Islamic Republic with direct action if diplomacy doesn't produce the desired results.

And with a second aircraft carrier group headed to the Gulf, Trump's warnings that an attack on Iran would go beyond last summer's bombings on nuclear facilities leave a range of options open to the president.

There could be new rounds of targeted strikes, assassinations of top leaders or a more sustained military campaign that could resemble something closer to a Third Gulf War.